Add initial Supervisor docs

source/_components/sensor.supervisord.markdown

@@ -0,0 +1,26 @@
+---
+layout: page
+title: "Supervisord"
+description: "Instructions how to integrate Supervisord within Home Assistant."
+date: 2016-05-13 22:00
+sidebar: true
+comments: false
+sharing: true
+footer: true
+ha_category: Sensor
+ha_release: 0.20
+---
+
+The `supervisord` platform allows you to track the states of [Supervisor](http://supervisord.org/).
+
+```yaml
+# Example configuration.yaml entry
+sensor:
+  platform: supervisord
+  url: http://192.168.1.1:9001/RPC2
+```
+
+Configuration variables:
+
+- **url** (*Optional*): The URL to track. Default to `http://localhost:9001/RPC2`.
+